.
Thread 2 (process 11441):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7faedae in __lll_mutex_lock_wait ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb7faaaac in _L_mutex_lock_51 () from /lib/tls/i686/cmov/libpthread.so.0
#3  0xb7faa49d in pthread_mutex_lock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#4  0xb759aa2c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#5  0x08a3ab10 in ?? ()
#6  0xb7608b7c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#7  0xb6155a18 in ?? ()
#8  0xb759a9b0 in gdk_threads_enter () from /usr/lib/libgdk-x11-2.0.so.0
Backtrace stopped: frame did not save the PC
.
Thread 1 (process 11413):
#0  0xb7faa460 in pthread_mutex_lock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#1  0xb74552e4 in ?? () from /usr/lib/libcairo.so.2
#2  0x000000ec in ?? ()
#3  0x09918330 in ?? ()
#4  0xbfb69128 in ?? ()
#5  0xb7464258 in cairo_ft_font_face_create_for_pattern ()
   from /usr/lib/libcairo.so.2
#6  0xb74558fd in cairo_scaled_font_text_extents ()
   from /usr/lib/libcairo.so.2
#7  0xb754d5a0 in ?? () from /usr/lib/libpangocairo-1.0.so.0
#8  0x00000000 in ?? ()